source4/heimdal/lib/asn1/gen_copy.c

   1 /*
   2  * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "gen_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 static int used_fail;
  39
  40 static void
  41 copy_primitive (const char *typename, const char *from, const char *to)
  42 {
  43     fprintf (codefile, "if(der_copy_%s(%s, %s)) goto fail;\n",
  44              typename, from, to);
  45     used_fail++;
  46 }
  47
  48 static void
  49 copy_type (const char *from, const char *to, const Type *t, int preserve)
  50 {
  51     switch (t->type) {
  52     case TType:
  53 #if 0
  54         copy_type (from, to, t->symbol->type, preserve);
  55 #endif
  56         fprintf (codefile, "if(copy_%s(%s, %s)) goto fail;\n",
  57                  t->symbol->gen_name, from, to);
  58         used_fail++;
  59         break;
  60     case TInteger:
  61         if (t->range == NULL && t->members == NULL) {
  62             copy_primitive ("heim_integer", from, to);
  63             break;
  64         }
  65         /* FALLTHROUGH */
  66     case TBoolean:
  67     case TEnumerated :
  68         fprintf(codefile, "*(%s) = *(%s);\n", to, from);
  69         break;
  70     case TOctetString:
  71         copy_primitive ("octet_string", from, to);
  72         break;
  73     case TBitString:
  74         if (HEIM_TAILQ_EMPTY(t->members))
  75             copy_primitive ("bit_string", from, to);
  76         else
  77             fprintf(codefile, "*(%s) = *(%s);\n", to, from);
  78         break;
  79     case TSet:
  80     case TSequence:
  81     case TChoice: {
  82         Member *m, *have_ellipsis = NULL;
  83
  84         if(t->members == NULL)
  85             break;
  86
  87         if ((t->type == TSequence || t->type == TChoice) && preserve) {
  88             fprintf(codefile,
  89                     "{ int ret;\n"
  90                     "ret = der_copy_octet_string(&(%s)->_save, &(%s)->_save);\n"
  91                     "if (ret) goto fail;\n"
  92                     "}\n",
  93                     from, to);
  94             used_fail++;
  95         }
  96
  97         if(t->type == TChoice) {
  98             fprintf(codefile, "(%s)->element = (%s)->element;\n", to, from);
  99             fprintf(codefile, "switch((%s)->element) {\n", from);
 100         }
 101
 102         HEIM_TAILQ_FOREACH(m, t->members, members) {
 103             char *fs;
 104             char *ts;
 105
 106             if (m->ellipsis) {
 107                 have_ellipsis = m;
 108                 continue;
 109             }
 110
 111             if(t->type == TChoice)
 112                 fprintf(codefile, "case %s:\n", m->label);
 113
 114             if (asprintf (&fs, "%s(%s)->%s%s",
 115                           m->optional ? "" : "&", from,
 116                           t->type == TChoice ? "u." : "", m->gen_name) < 0)
 117                 errx(1, "malloc");
 118             if (fs == NULL)
 119                 errx(1, "malloc");
 120             if (asprintf (&ts, "%s(%s)->%s%s",
 121                           m->optional ? "" : "&", to,
 122                           t->type == TChoice ? "u." : "", m->gen_name) < 0)
 123                 errx(1, "malloc");
 124             if (ts == NULL)
 125                 errx(1, "malloc");
 126             if(m->optional){
 127                 fprintf(codefile, "if(%s) {\n", fs);
 128                 fprintf(codefile, "%s = malloc(sizeof(*%s));\n", ts, ts);
 129                 fprintf(codefile, "if(%s == NULL) goto fail;\n", ts);
 130                 used_fail++;
 131             }
 132             copy_type (fs, ts, m->type, FALSE);
 133             if(m->optional){
 134                 fprintf(codefile, "}else\n");
 135                 fprintf(codefile, "%s = NULL;\n", ts);
 136             }
 137             free (fs);
 138             free (ts);
 139             if(t->type == TChoice)
 140                 fprintf(codefile, "break;\n");
 141         }
 142         if(t->type == TChoice) {
 143             if (have_ellipsis) {
 144                 fprintf(codefile, "case %s: {\n"
 145                         "int ret;\n"
 146                         "ret=der_copy_octet_string(&(%s)->u.%s, &(%s)->u.%s);\n"
 147                         "if (ret) goto fail;\n"
 148                         "break;\n"
 149                         "}\n",
 150                         have_ellipsis->label,
 151                         from, have_ellipsis->gen_name,
 152                         to, have_ellipsis->gen_name);
 153                 used_fail++;
 154             }
 155             fprintf(codefile, "}\n");
 156         }
 157         break;
 158     }
 159     case TSetOf:
 160     case TSequenceOf: {
 161         char *f = NULL, *T = NULL;
 162
 163         fprintf (codefile, "if(((%s)->val = "
 164                  "malloc((%s)->len * sizeof(*(%s)->val))) == NULL && (%s)->len != 0)\n",
 165                  to, from, to, from);
 166         fprintf (codefile, "goto fail;\n");
 167         used_fail++;
 168         fprintf(codefile,
 169                 "for((%s)->len = 0; (%s)->len < (%s)->len; (%s)->len++){\n",
 170                 to, to, from, to);
 171         if (asprintf(&f, "&(%s)->val[(%s)->len]", from, to) < 0)
 172             errx(1, "malloc");
 173         if (f == NULL)
 174             errx(1, "malloc");
 175         if (asprintf(&T, "&(%s)->val[(%s)->len]", to, to) < 0)
 176             errx(1, "malloc");
 177         if (T == NULL)
 178             errx(1, "malloc");
 179         copy_type(f, T, t->subtype, FALSE);
 180         fprintf(codefile, "}\n");
 181         free(f);
 182         free(T);
 183         break;
 184     }
 185     case TGeneralizedTime:
 186         fprintf(codefile, "*(%s) = *(%s);\n", to, from);
 187         break;
 188     case TGeneralString:
 189         copy_primitive ("general_string", from, to);
 190         break;
 191     case TTeletexString:
 192         copy_primitive ("general_string", from, to);
 193         break;
 194     case TUTCTime:
 195         fprintf(codefile, "*(%s) = *(%s);\n", to, from);
 196         break;
 197     case TUTF8String:
 198         copy_primitive ("utf8string", from, to);
 199         break;
 200     case TPrintableString:
 201         copy_primitive ("printable_string", from, to);
 202         break;
 203     case TIA5String:
 204         copy_primitive ("ia5_string", from, to);
 205         break;
 206     case TBMPString:
 207         copy_primitive ("bmp_string", from, to);
 208         break;
 209     case TUniversalString:
 210         copy_primitive ("universal_string", from, to);
 211         break;
 212     case TVisibleString:
 213         copy_primitive ("visible_string", from, to);
 214         break;
 215     case TTag:
 216         copy_type (from, to, t->subtype, preserve);
 217         break;
 218     case TOID:
 219         copy_primitive ("oid", from, to);
 220         break;
 221     case TNull:
 222         break;
 223     default :
 224         abort ();
 225     }
 226 }
 227
 228 void
 229 generate_type_copy (const Symbol *s)
 230 {
 231   int preserve = preserve_type(s->name) ? TRUE : FALSE;
 232   int save_used_fail = used_fail;
 233   int deco_opt;
 234   char *ft, *fn;
 235
 236   used_fail = 0;
 237
 238   fprintf (codefile, "int ASN1CALL\n"
 239            "copy_%s(const %s *from, %s *to)\n"
 240            "{\n"
 241            "memset(to, 0, sizeof(*to));\n",
 242            s->gen_name, s->gen_name, s->gen_name);
 243   copy_type ("from", "to", s->type, preserve);
 244   if (decorate_type(s->gen_name, &ft, &fn, &deco_opt)) {
 245       if (deco_opt) {
 246           fprintf(codefile, "if (from->%s) {\n", fn);
 247           fprintf(codefile, "(to)->%s = malloc(sizeof(*(to)->%s));\n", fn, fn);
 248           fprintf(codefile, "if (copy_%s((from)->%s, (to)->%s)) goto fail;\n", ft, fn, fn);
 249           fprintf(codefile, "}\n");
 250       } else {
 251           fprintf(codefile, "if (copy_%s(&(from)->%s, &(to)->%s)) goto fail;\n", ft, fn, fn);
 252       }
 253       used_fail++;
 254       free(ft);
 255       free(fn);
 256   }
 257   fprintf (codefile, "return 0;\n");
 258
 259   if (used_fail)
 260       fprintf (codefile, "fail:\n"
 261                "free_%s(to);\n"
 262                "return ENOMEM;\n",
 263                s->gen_name);
 264
 265   fprintf(codefile,
 266           "}\n\n");
 267   used_fail = save_used_fail;
 268 }
 269